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Ada County, ID Parcels & GIS Data

Ada County, ID parcel data: 219,179 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Ada County, Idaho parcel data covering 219,179 property records.

This page documents parcel-level coverage for Ada County, Idaho. Each parcel record carries its boundary polygon (GIS geometry) along with attributes such as the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and most recent sale price and date. Exact fill rates for Ada County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Ada County property dataset.

Ada County is located in the southwestern part of Idaho, United States. As of the 2020 census, the county had a population of 494,967, which by 2025 was estimated to have risen to 546,141. Ada County is by far the state's most populous county; it is home to 26.8% of the state's population. The county seat and largest city is Boise, which is also the state capital.

FIPS 16001

Official county website: https://adacounty.id.gov/developmentservices/building-division/

The FIPS code for Ada County is 16001.

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Attribute coverage

Ada County contains 219,179 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%219,179
parcelid100%219,179
parcelid299.0%217,078
ogparcelid100%219,179
ogparcelid299.0%217,066
parentid<0.1%0
stackid<0.1%0
geoid100%219,179
statefp100%219,179
countyfp100%219,179
countyname100%219,179
cousubfp100%219,179
cousubname100%219,179
tractce100%219,179
tractname100%219,179
taxacctnum<0.1%0
taxyear100%219,179
taxdistrict99.9%218,919
usecode<0.1%2
usedesc99.9%218,919
zoningcode99.9%218,985
zoningdesc<0.1%0
numbldgs96.7%212,036
numunits88.0%192,865
yearbuilt<0.1%0
numfloors64.0%140,272
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue89.7%196,634
landvalue89.9%197,075
agvalue89.9%197,075
totalvalue99.0%217,055
taxacres100%219,178
calcarea100%219,179
saleamt<0.1%0
saledate<0.1%0
ownertype50.7%111,060
ownername50.7%111,060
owneraddr94.2%206,403
ownercity<0.1%19
ownerstate<0.1%19
ownerzip<0.1%19
parceladdr99.9%218,976
parcelcity<0.1%22
parcelstate100%219,179
parcelzip99.8%218,711
legaldesc99.9%219,043
township100%219,161
section100%219,161
qtrsection100%219,161
range100%219,161
plssdesc100%219,161
book<0.1%0
page<0.1%0
block<0.1%0
lot<0.1%0
parceltype0.9%1,909
accesstype0.9%1,909
iucnclass0.6%1,277
placename4.6%9,974
placetype4.5%9,853
firmid100%219,086
firmdate100%219,086
fldzone100%219,086
zonesubty97.4%213,530
staticbfe<0.1%11
elevmin0.6%1,212
elevmax0.6%1,212
elevavg0.6%1,212
fireplaces<0.1%0
heating<0.1%0
heatfuel<0.1%0
cooling<0.1%0
foundation<0.1%0
roofcover<0.1%0
siding<0.1%0
bldgtype<0.1%0
naicscode4.8%10,586
frsid<0.1%1
dfrurl<0.1%1
caapermit<0.1%1
cwapermit<0.1%1
rcrapermit<0.1%1
updated100%219,179
centroidx100%219,179
centroidy100%219,179
surfpointx100%219,179
surfpointy100%219,179
geom100%219,179
extras100%219,179
ownerlist38.8%85,041
placefp88.0%192,880
zoningurl<0.1%0

Schema mapping

How source columns from the acquired Ada County GIS layers map into the harmonized entity schemas and assemble into the published parcel table, alongside supplemented fields (elevation, flood zone) and deterministic columns.

Schema mapping — Ada County, Idaho (16001) 1 entity · most recent acquisition per entity · generated 2026-08-30 direct column transformed (expression) geometry extras json supplemented determined ALL ENTITIES → FINAL PARCEL SCHEMA Harmonized entity columns assemble into publish.parcel_layer — matched by column name. Supplemented fields show their fill rate in this county. SOURCE COLUMNS HARMONIZED ENTITIES PUBLISH.PARCEL_LAYER PARCEL parcel_id fp_id val_impvts val_land val_total asr_acres owner1 owner2 mail_add1 mail_add2 mail_city mail_state mail_zip site_add site_city site_zip lgl_descr updated website geom 11 cols ⇢ parcelid parcelid2 imprvalue landvalue totalvalue taxacres ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelzip legaldesc updated sourceurl geom extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 100% taxyear geom · derived from geometry geom dem.us_1m · USGS 1m DEM 0.6% elevmin 0.6% elevmax 0.6% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 97.4% zonesubty 0.0% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 100% taxdistrict 100% usedesc 100% zoningcode 96.7% numbldgs 88.0% numunits 64.0% numfloors 89.9% agvalue 100% parcelstate 100% township 100% section 100% qtrsection 100% range 100% plssdesc 88.0% placefp lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxyear taxdistrict usedesc zoningcode numbldgs numunits numfloors imprvalue landvalue agvalue totalvalue taxacres calcarea ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip legaldesc township section qtrsection range plssdesc firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras placefp publish.parcel_layer columns not fed by these sources (37) — empty or below 50% fill in this county parentid, stackid, taxacctnum, usecode, zoningdesc, yearbuilt, bldgsqft, bedrooms, halfbaths, fullbaths, saleamt, saledate, book, page, block lot, parceltype, accesstype, iucnclass, placename, placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit, ownerlist, zoningurl PARCEL 18 mapped · 11 transformed · 11 kept in extras · 36 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL parcel_id fp_id val_impvts val_land val_total asr_acres owner1 owner2 mail_add1 mail_add2 mail_city mail_state mail_zip site_add site_city site_zip lgl_descr updated website geom parcelid parcelid2 imprvalue landvalue totalvalue taxacres ownername NULLIF(concat_ws('; ', NULLIF(trim(owner1), ''), NULLIF(trim(ow… owneraddr NULLIF(concat_ws(' ', NULLIF(trim(mail_add1), ''), NULLIF(trim(… ownercity NULLIF(trim(mail_city), '')::text ownerstate NULLIF(trim(mail_state), '')::text ownerzip NULLIF(trim(mail_zip), '')::text parceladdr NULLIF(trim(site_add), '')::text parcelcity NULLIF(trim(site_city), '')::text parcelzip NULLIF(trim(site_zip), '')::text legaldesc NULLIF(trim(lgl_descr), '')::text updated CASE WHEN updated IS NOT NULL THEN to_timestamp(updated::double… sourceurl NULLIF(trim(website), '')::text geom extras · 11 source columns preserved as json steward, county, fips, lat_dd, long_dd, idtm_n, idtm_e public_std, mail_cntry, asr_cats, home_exmpt extras not present in source — filled with NULL (36) taxacctnum, taxyear, usecode, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths fullbaths, agvalue, saleamt, saledate, parcelstate, township, section, qtrsection, range, plssdesc, book, page, block, lot, taxdistrict parentid, heatfuel, fireplaces, heating, cooling, foundation, roofcover, siding

Neighboring counties

Parcel data for counties bordering Ada County:

Frequently asked questions

Where can I find Ada County, ID parcel and GIS data?

Land Records publishes a Ada County, ID parcel dataset in which every parcel carries its boundary polygon (GIS geometry) along with ownership, assessed value, land use, acreage, and sale history. Preview it in the interactive explorer on this page, or download the full Ada County, ID dataset as a GeoPackage or CSV.

How many parcels are in Ada County, ID?

The current dataset contains 219,179 parcel records for Ada County, ID, each with its boundary geometry and assessor attributes.

What is the FIPS code for Ada County, ID?

The FIPS code for Ada County, ID is 16001.

What information does each Ada County, ID parcel record include?

Each Ada County, ID parcel record includes the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and the most recent sale price and date — plus the parcel boundary polygon. Per-attribute fill rates are listed in the coverage table on this page.

Is Ada County, ID parcel data free?

You can preview Ada County, ID parcels for free in the interactive explorer. The complete dataset is available as a one-time download or through the nationwide parcel web service; see the download options on this page for current pricing.

Does Ada County, ID have an official GIS or property records website?

Yes — the official Ada County, ID government website is linked in the county details above. Land Records standardizes Ada County, ID assessor and recorder records into a single nationwide parcel schema with GIS boundary geometry.

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated